Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
DATA Timer
DATA Timer
expired
Close connection
Client Server
PTTP.ACK(i-1)
PTTP.DATA(i)
PTTP.DATA(i)
PTTP.ACK(i)
PTTP.DATA(i)
PTTP.DATA(i)
ACK Timer expired
Retransmit last
data block
ACK Timer expired
Retransmit last
data block
ACK Timer expired
Retransmit last
data block
Maximum Number
of Retransmissions
exceeded
Close connection
Figure 155 DATA timer expiration and Maximum Number of Retransmissions exceeded.
12.2.5.3 PTTP Packets Format
All the packets used by the PTTP protocol are encapsulated with the CCP format, with Type0 0x07. The Type1
field indicates the type of packet within the PTTP protocol:
• 0x06 RRQ (Establish connection)
• 0x07 Data
• 0x08 Data Ack
Submission page 367 UPA-OPERA
ACK Timer
ACK Timer
ACK Timer
Max_Retransmissions · ACK_Timer